Paula Broadwell's father, Paul Kranz, was convicted of a misdemeanor for threatening a female partner's boyfriend nearly 30 years ago, according to North Dakota court documents and a prosecutor who worked on the case.

The conviction was overturned after the North Dakota Supreme Court ruled the next year that Kranz had been denied his right to a jury trial.

Burleigh County, of which Bismarck is comprised, throws out its misdemeanor documents after seven years and its felonies after 21. But the North Dakota Supreme Court appeal that ordered a new trial still exists.

Patricia Burke, the prosecutor on the appeal, said the case involved "a dispute with his then-wife or ex-wife and her boyfriend." Burke couldn't remember the exact details of the 1983 case, she said.

The Daily Mail reported that Kranz still lives with Broadwell's mother Nadene, but according to Nadene's Facebook page, she lives in Boise, Idaho.

Details of the case are scant, and Kranz didn't respond to queries. The Supreme Court decision rules that "in trial to the court there was presented conflicting testimony concerning whether or not Kranz threatened the alleged victim with imminent serious bodily injury."

Broadwell is at the center of a scandal that brought down General David Petraeus; the biographer was found to have been carrying on an affair with the general. Both are married.

The evidence that led the FBI to Broadwell were threatening emails she had been sending to another woman who also knew Petraeus.

Rosie Gray is a reporter for BuzzFeed News and is based in Washington, D.C. Gray reports on politics and foreign policy.